Injection locking of a low cost high power laser diode at 461 nm

Abstract

Stable laser sources at 461 nm are important for optical cooling of strontium atoms. In most existing experiments this wavelength is obtained by frequency doubling infrared lasers, since blue laser diodes either have low power or large emission bandwidths. Here, we show that injecting less than 10 mW of monomode laser radiation into a blue multimode 500 mW high power laser diode is capable of slaving at least 50% of the power to the desired frequency. We verify the emission bandwidth reduction by saturation spectroscopy on a strontium gas cell and by direct beating of the slave with the master laser. We also demonstrate that the laser can efficiently be used within the Zeeman slower for optical cooling of a strontium atomic beam.

2nd corrected version (minor revisions); Manuscript accepted for publication in Review of Scientific Instruments; 5 pages, 6 figures

References in corpus (2)

• Systematic evaluation of an atomic clock at 2e-18 total uncertainty
• A transportable strontium optical lattice clock

Cited by in corpus (6)

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• High power continuous laser at 461 nm based on a compact and high-efficiency frequency-doubling linear cavity
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• Enhanced Polarization Locking in VCSELs
• Watt-class injection-locked diode laser system at 399 nm for atomic physics